CN104202044A - Differential push-push voltage controlled oscillator and signal generation device - Google Patents
Differential push-push voltage controlled oscillator and signal generation device Download PDFInfo
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- CN104202044A CN104202044A CN201410384957.0A CN201410384957A CN104202044A CN 104202044 A CN104202044 A CN 104202044A CN 201410384957 A CN201410384957 A CN 201410384957A CN 104202044 A CN104202044 A CN 104202044A
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Abstract
The present invention discloses a differential push-push voltage controlled oscillator and signal generation device, comprising a quadrature oscillator, two harmonic selection elements, two frequency multiplier circuits and a power combination element. The quadrature oscillator generates two orthogonal signals and respective harmonic signals, two harmonic selection elements are used for extracting secondary harmonics in two output signals of the oscillator, generating the output of a differential push-push signal; two frequency multiplier circuits are used for frequency multiplication of the signal, generating two frequency multiplier signals with the same phase; the power combination element achieves the combination of power of two signals with the same phase, forming the output of a single-end signal source. The signal source achieves the output of a differential push-push voltage controlled oscillator by a harmonic extraction and frequency multiplication manner, increases the output frequency of signals and utilizes two orthogonal oscillation signals in connection with a power combination manner to increase the output power of signals.
Description
Technical field
The invention belongs to microelectronics technical field, relate to a kind of difference and push away-push controlled oscillator and signal generation device.
Background technology
Terahertz (TeraHertz, THz) ripple refers to the electromagnetic wave of frequency in 0.1～10THz (wavelength 0.03-3mm) scope, its wave band, between microwave and far red light, is last spectral window requiring study in electromagnetic spectrum.THz wave combines the plurality of advantages of microwave and infrared waves, there is a lot of special character, as transient state, broadband property, coherence and good penetrability etc., therefore Terahertz frequency range has great application prospect and unique advantage in fields such as medical imaging, high-speed radiocommunication, radar remote sensing detection, anti-terrorism drug law enforcement.
THz source is the bottleneck of realizing Terahertz application, and the THz source based on photonic propulsion and vacuum electronics has output wave length, radiant power advantages of higher, is applied in fields such as remote imaging and non-destruction high-penetration POP researchs; But bulky, the shortcoming such as energy consumption is high, output stability is poor that have equipment needed thereby, application is restricted.Along with the progress of semiconductor technology and the quick raising of device performance, the solid-state discrete circuit of Terahertz or solid-state monolithic integrated circuit become the effective means that realizes high stable, tunable, miniaturization THz source.But be subject to the restriction of existing technique and device property, in solid-state THz source, the output frequency of voltage controlled oscillator is limited, its frequency is by the cut-off frequency f of active device
tdetermine.In order to realize higher output frequency under special process, can adopt the voltage controlled oscillator form of push-push configuration, in this structure, output signal is the second harmonic of oscillator oscillator signal, active device in oscillator is operated in 1/2 place of output signal frequency, and therefore the frequency of output signal is greatly improved; But the output signal output of this structure is single-ended signal, actual application all needs differential signal as the input signal of pre-divider in the local oscillation signal as frequency mixer in receiver or phase-locked loop; In addition, because output signal is the second harmonic in oscillator signal, device power is less, cannot meet actual application requirements.
Summary of the invention
The object of the invention is for the deficiencies in the prior art, propose a kind of difference and push away-push controlled oscillator and signal generation device.Utilize quadrature oscillator in conjunction with harmonic wave extraction, frequency multiplication and power synthetic technique, under existing process conditions, realize difference form and higher frequency, the signal source of high-power output more.
The present invention includes a quadrature oscillator, two harmonic wave selectors, two frequency multiplier circuits and a power synthin, quadrature oscillator and harmonic wave selectors form difference and push away-push controlled oscillator, and quadrature oscillator produces two-way orthogonal signalling (0
o, 180
owith 90
o, 270
o) and each harmonic signal, two harmonic wave selectors connect respectively the output of quadrature oscillator, for extracting the second harmonic of oscillator output signal, generate differential output signal, output to respectively difference and push away-push in-phase output end and the reversed-phase output of controlled oscillator; Two frequency multiplier circuits and power synthin form frequency multiplier, and the input of the first frequency multiplier circuit is as the in-phase input end of frequency multiplier, and the in-phase output end that pushes away-push controlled oscillator with difference is connected, the in-phase output end of exporting as signal source difference; The input of the second frequency multiplier circuit is as the inverting input of frequency multiplier, and the reversed-phase output that pushes away-push controlled oscillator with difference is connected, the reversed-phase output of simultaneously exporting as signal source difference; Two-way frequency multiplier circuit, for input signal is carried out to frequency multiplication, generates two frequency-doubled signals of homophase; The first signal input of power synthin is connected with the signal output part of the first frequency multiplier circuit, and the secondary signal input of power synthin is connected with the signal output part of the second frequency multiplier circuit; The signal output part of power synthin is as the single-ended signal output of frequency multiplier and signal source;
Described difference pushes away-pushes controlled oscillator and comprises a quadrature oscillator and two harmonic wave selectors; The drain electrode of the grid of the one NMOS pipe, the drain electrode of the 2nd NMOS pipe, the second tube coupling, one end of the second varactor are connected with one end of the second inductance, as the first output of the first capacitor and inductor type voltage controlled oscillator; The drain electrode of the grid of the 2nd NMOS pipe, the drain electrode of a NMOS pipe, the first tube coupling, one end of the first varactor are connected with one end of the first inductance, as the second output of the first capacitor and inductor type voltage controlled oscillator; The other end of the first varactor is connected with the other end of the second varactor, as external voltage control end; The source ground of the one NMOS pipe, the 2nd NMOS pipe, the first tube coupling and the second tube coupling; The grid of the first tube coupling connects the second output of the second capacitor and inductor type voltage controlled oscillator; The grid of the second tube coupling connects the first output of the second capacitor and inductor type voltage controlled oscillator; One termination power vd D of first harmonic selectors; The other end of the first inductance, the other end of the second inductance are connected with the other end of first harmonic selectors, push away-push away the in-phase output end of voltage-controlled oscillator circuit as difference;
The drain electrode of the grid of the 3rd NMOS pipe, the drain electrode of the 4th NMOS pipe, the 4th tube coupling, one end of the 4th varactor are connected with one end of the 4th inductance, as the first output of the second capacitor and inductor type voltage controlled oscillator; The drain electrode of the grid of the 4th NMOS pipe, the drain electrode of the 3rd NMOS pipe, the 3rd tube coupling, one end of the 3rd varactor are connected with one end of the 3rd inductance, as the second output of the second capacitor and inductor type voltage controlled oscillator; The other end of the 3rd varactor is connected with the other end of the 4th varactor, as external voltage control end; The source ground of the 3rd NMOS pipe, the 4th NMOS pipe, the 3rd tube coupling and the 4th tube coupling; The grid of the 3rd tube coupling connects the first output of the first capacitor and inductor type voltage controlled oscillator; The grid of the 4th tube coupling connects the second output of the first capacitor and inductor type voltage controlled oscillator; One end of second harmonic selectors connects power vd D; The other end of the 3rd inductance, the other end of the 4th inductance are connected with the other end of second harmonic selectors, push away-push away the reversed-phase output of voltage-controlled oscillator circuit as difference.
Described frequency multiplier circuit comprises two strip metal bars and two varactors; One port of the first bonding jumper is as the signal input part of frequency multiplier circuit, the another port ground connection of the first bonding jumper; The first port of the second bonding jumper is connected with one end of the 5th varactor, and the second port of the second bonding jumper is connected with one end of the 6th varactor; The 3rd port of the second bonding jumper is as the signal output part of frequency multiplier circuit; The other end of the 5th varactor, the other end ground connection of the 6th varactor.
Described power synthin is one or three port bonding jumpers; This bonding jumper first port, the second port are respectively as first signal input and the secondary signal input of power synthin; This bonding jumper the 3rd port is as the signal output part of power synthin.
This signal source adopts harmonic wave to extract the way of output as voltage controlled oscillator, and the output frequency that makes oscillator is far away higher than the operating frequency of active device; Meanwhile, utilize the phase relation of the orthogonal two-way output signal of quadrature oscillator and in conjunction with harmonic wave selectors, realized the controlled oscillator that pushes away-push of difference and exported; Push away-push in difference on the basis of controlled oscillator, utilize passive frequency multiplier circuit further to improve the frequency of output signal; In conjunction with the feature of two paths of signals homophase after frequency multiplication, utilize power synthetic technique to improve the power of output signal; Finally make frequency and the power of signal source output signal under special process be improved.
Brief description of the drawings
Fig. 1 is structural representation of the present invention;
Fig. 2 is the structural representation that in Fig. 1, difference pushed away-pushed controlled oscillator 1;
Fig. 3 is the structural representation of frequency multiplier circuit in Fig. 1;
Fig. 4 is the structural representation of power synthin in Fig. 1;
Fig. 5 is the structural representation of frequency multiplier in Fig. 1.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further illustrated.
The invention provides a kind of difference and push away-push controlled oscillator and signal generation device, utilize quadrature oscillator in conjunction with harmonic wave extract, passive frequency multiplication and power synthetic technique, under existing process conditions, realize higher frequency and the signal source of high-power output more.As shown in Figure 1, the present invention includes a quadrature oscillator 3, two harmonic wave selectors 4/5, two frequency multiplier circuits 6/7 and power synthins 8.According to the present invention, quadrature oscillator 3 and harmonic wave selectors 4/5 form difference and push away-push controlled oscillator 1, and quadrature oscillator 3 produces two-way orthogonal signalling (0
o, 180
owith 90
o, 270
o) and each harmonic signal, two harmonic wave selectors 4/5 connect respectively the two-way output of quadrature oscillator 3, for extracting the second harmonic of oscillator 3 two-way output signals, generate differential output signal, output to respectively difference and push away-push in-phase output end Vout+ and the reversed-phase output Vout-of controlled oscillator 1; Frequency multiplier circuit and power synthin form frequency multiplier, the input RFin of the first frequency multiplier circuit 6 is as the in-phase input end RFin+ of frequency multiplier 2, the in-phase output end Vout+ that pushes away-push controlled oscillator 1 with difference is connected, the in-phase output end Vout_f simultaneously exporting as signal source difference; The input RFin+ of the second frequency multiplier circuit 7 is as the inverting input RFin-of frequency multiplier 2, and the reversed-phase output that pushes away-push controlled oscillator 1 with difference is connected Vout-, the reversed-phase output Voutb_f simultaneously exporting as signal source difference; Two-way frequency multiplier circuit, for input signal is carried out to frequency multiplication, generates two frequency multiplication output signals of homophase; The first signal input V1 of power synthin 8 is connected with the signal output part RFout of the first frequency multiplier circuit 6, and the secondary signal input V2 of power synthin 8 is connected with the signal output part RFout of the second frequency multiplier circuit 7; The signal output part V3 of power synthin 8 is as the single-ended signal output end vo ut_2f of frequency multiplier and signal source;
Described difference pushes away-pushes controlled oscillator 1 and comprises an orthogonal voltage-controlled vibrator and two harmonic wave selectors, as shown in Figure 2; The grid of the one NMOS pipe MN1, the drain electrode of the 2nd NMOS pipe MN2, the drain electrode of the second tube coupling MNC2, one end of the second varactor Cvar2 are connected with one end of the second inductance L 2, as the first output I+ of the first capacitor and inductor type voltage controlled oscillator; The grid of the 2nd NMOS pipe MN2, the drain electrode of a NMOS pipe MN1, the drain electrode of the first tube coupling MNC1, one end of the first varactor Cvar1 are connected with one end of the first inductance L 1, as the second output I-of the first capacitor and inductor type voltage controlled oscillator; The other end of the first varactor Cvar1 is connected with the other end of the second varactor Cvar2, as external voltage control end Vtune; The source ground of the one NMOS pipe MN1, the 2nd NMOS pipe MN2, the first tube coupling MNC1 and the second tube coupling MNC2; The grid of the first tube coupling MNC1 meets the second output Q-of the second capacitor and inductor type voltage controlled oscillator; The grid of the second tube coupling MNC2 meets the first output Q+ of the second capacitor and inductor type voltage controlled oscillator; One end of first harmonic selectors T1 connects power vd D; The other end of the first inductance L 1, the other end of the second inductance L 2 are connected with the other end of first harmonic selectors T1, push away-push away the in-phase output end Vout+ of voltage-controlled oscillator circuit 1 as difference.
The grid of the 3rd NMOS pipe MN3, the drain electrode of the 4th NMOS pipe MN4, the drain electrode of the 4th tube coupling MNC4, one end of the 4th varactor Cvar4 are connected with one end of the 4th inductance L 4, as the first output Q+ of the second capacitor and inductor type voltage controlled oscillator; The grid of the 4th NMOS pipe MN4, the drain electrode of the 3rd NMOS pipe MN3, the drain electrode of the 3rd tube coupling MNC3, one end of the 3rd varactor Cvar3 are connected with one end of the 3rd inductance L 3, as the second output Q-of the second capacitor and inductor type voltage controlled oscillator; The other end of the 3rd varactor Cvar3 is connected with the other end of the 4th varactor Cvar4, as external voltage control end Vtune; The source ground of the 3rd NMOS pipe MN3, the 4th NMOS pipe MN4, the 3rd tube coupling MNC3 and the 4th tube coupling MNC4; The grid of the 3rd tube coupling MNC3 meets the first output I+ of the first capacitor and inductor type voltage controlled oscillator; The grid of the 4th tube coupling MNC4 meets the second output I-of a capacitor and inductor type voltage controlled oscillator; One end of second harmonic selectors T1 connects power vd D; The other end of the 3rd inductance L 3, the other end of the 4th inductance L 4 are connected with the other end of second harmonic selectors T2, push away-push away the reversed-phase output Vout-of voltage-controlled oscillator circuit 1 as difference.
Described frequency multiplier circuit 6/7 comprises two strip metal bar T3/T4 and two varactor Cvar5/Cvar6, as shown in Figure 3; A port of the first bonding jumper T3 is as the signal input part RFin of frequency multiplier circuit, the another port ground connection of the first bonding jumper T3; The first port of the second bonding jumper T4 is connected with one end of the 5th varactor Cvar5, and the second port of the second bonding jumper T4 is connected with one end of the 6th varactor Cvar6; The 3rd port of the second bonding jumper T4 is as the signal output part RFout of frequency multiplier circuit; The other end of the 5th varactor Cvar5, the other end ground connection of the 6th varactor Cvar6.
Described power synthin 8 is one or three port bonding jumper T5, as shown in Figure 4; This bonding jumper the first port V1, the second port V2 are as the signal input part of power synthin; This bonding jumper the 3rd port V3 is as the signal output part of power synthin.
Above-mentioned frequency multiplier circuit 6/7 and power synthin 8 form frequency multiplier 2, as shown in Figure 5.
Above-mentioned difference pushes away-pushes away in voltage-controlled oscillator circuit 1, because the fundamental frequency signal phase place of orthogonal voltage-controlled vibrator 3 two-way is 0
o, 180
owith 90
o, 270
o, corresponding second harmonic phase place is 0
owith 180
o, form difference and push away-push away output; Harmonic wave selectors T1 and T2 adopt transmission line to realize, the frequency of its length basis signal source output signal Vout is chosen, the frequency of supposing signal source output signal Vout is f, and the concussion frequency of orthogonal voltage-controlled vibrator 3 is f/4, and the frequency of second harmonic is f/2; The length of corresponding harmonic wave selectors T1 and T2 is 1/4 of f/2 frequency place signal wavelength, makes second harmonic see that in one end of harmonic wave selectors T1 and T2 the impedance on ground is infinitely great, realizes effective output of second harmonic.
In above-mentioned frequency multiplier circuit 2, varactor Cvar5/Cvar6/Cvar7/Cvar8 adopts accumulation type varactor (A-MOS), because charge carrier is for how sub, its cut-off frequency compare few son do charge carrier metal-oxide-semiconductor want high 2～3 times, therefore the passive frequency multiplier circuit based on A-MOS varactor can be operated in higher frequency.The length of bonding jumper T3 is 1/2 of input signal RFin wavelength, and making the impedance that input is seen is into zero, realizes effective transmission of input signal; Input signal RFin by Ba Lun be coupled generate two paths of differential signals be injected in bonding jumper T4, due to the symmetry of structure, A point is virtual earth point concerning differential signal; As shown in Figure 3, selecting the length of TL3 is 1/4 of input signal RFin wavelength, be the impedance transformation of 1/4 TL3 of frequency input signal place wavelength by length, make differential signal all be injected into varactor, realized effective isolation of effective injection, input and the output of input signal.Concerning frequency multiplication output signal, because input signal is differential signal, frequency multiplication output signal is in-phase signal, and its signal flows to as shown in Figure 3.Two-way homophase frequency-doubled signal is returned after B end meets, and only has few energy to let out by the parasitic capacitance coupling between TL0 and input line, and the frequency-doubled signal meeting at A point is exported by output port.The output signal of two-way frequency multiplier circuit by the synthetic rear output Vout of T shape transmission line structure bonding jumper T5 power, has realized effective isolation of effective transmission, output and the input of output signal again.
Although content of the present invention has been done detailed introduction by above preferred embodiment, will be appreciated that above-mentioned description should not be considered to limitation of the present invention.Having read after foregoing those skilled in the art, will be all apparent for multiple amendment of the present invention and replacement.
Claims (2)
1. a difference pushes away-pushes controlled oscillator and signal generation device, comprise a quadrature oscillator, two harmonic wave selectors, two frequency multiplier circuits and a power synthin, it is characterized in that: described quadrature oscillator and harmonic wave selectors form difference and push away-push controlled oscillator, quadrature oscillator produces two-way orthogonal signalling and each harmonic signal, two harmonic wave selectors connect respectively the output of quadrature oscillator, for extracting the second harmonic of oscillator output signal, generate differential output signal, output to respectively in-phase output end and reversed-phase output that difference pushed away-pushed controlled oscillator,
Described two frequency multiplier circuits and power synthin form the frequency multiplier of difference input, Single-end output, the input of the first frequency multiplier circuit is as the in-phase input end of frequency multiplier, the in-phase output end that pushes away-push controlled oscillator with difference is connected, the in-phase output end of simultaneously exporting as signal source difference; The input of the second frequency multiplier circuit is as the inverting input of frequency multiplier, and the reversed-phase output that pushes away-push controlled oscillator with difference is connected, the in-phase output end of simultaneously exporting as signal source difference; Two-way frequency multiplier circuit, for input signal is carried out to frequency multiplication, generates two frequency-doubled signals of homophase; The first signal input of power synthin is connected with the signal output part of the first frequency multiplier circuit, and the secondary signal input of power synthin is connected with the signal output part of the second frequency multiplier circuit; The signal output part of power synthin is as the single-ended signal output of frequency multiplier and signal source.
2. a kind of difference as claimed in claim 1 pushes away-pushes controlled oscillator and signal generation device, it is characterized in that: described difference pushes away-pushes controlled oscillator and comprises a quadrature oscillator and two harmonic wave selectors, described quadrature oscillator comprises a NMOS pipe, the 2nd NMOS pipe, the 3rd NMOS pipe, the 4th NMOS pipe, the first tube coupling, the second tube coupling, the 3rd tube coupling, the 4th tube coupling, the first inductance, the second inductance, the 3rd inductance, the 4th inductance, the first tube coupling, the second tube coupling, the 3rd tube coupling, the 4th tube coupling, the first varactor, the second varactor, the 3rd varactor and the 4th varactor, the grid of a described NMOS pipe, the drain electrode of the 2nd NMOS pipe, the drain electrode of the second tube coupling, one end of the second varactor is connected with one end of the second inductance, as the first output of the first capacitor and inductor type voltage controlled oscillator, the drain electrode of the grid of the 2nd NMOS pipe, the drain electrode of a NMOS pipe, the first tube coupling, one end of the first varactor are connected with one end of the first inductance, as the second output of the first capacitor and inductor type voltage controlled oscillator, the other end of the first varactor is connected with the other end of the second varactor, as external voltage control end, the source ground of the one NMOS pipe, the 2nd NMOS pipe, the first tube coupling and the second tube coupling, the grid of the first tube coupling connects the second output of the second capacitor and inductor type voltage controlled oscillator, the grid of the second tube coupling connects the first output of the second capacitor and inductor type voltage controlled oscillator, one termination power vd D of first harmonic selectors, the other end of the first inductance, the other end of the second inductance are connected with the other end of first harmonic selectors, push away-push away the in-phase output end of voltage-controlled oscillator circuit as difference,
The drain electrode of the grid of the 3rd NMOS pipe, the drain electrode of the 4th NMOS pipe, the 4th tube coupling, one end of the 4th varactor are connected with one end of the 4th inductance, as the first output of the second capacitor and inductor type voltage controlled oscillator; The drain electrode of the grid of the 4th NMOS pipe, the drain electrode of the 3rd NMOS pipe, the 3rd tube coupling, one end of the 3rd varactor are connected with one end of the 3rd inductance, as the second output of the second capacitor and inductor type voltage controlled oscillator; The other end of the 3rd varactor is connected with the other end of the 4th varactor, as external voltage control end; The source ground of the 3rd NMOS pipe, the 4th NMOS pipe, the 3rd tube coupling and the 4th tube coupling; The grid of the 3rd tube coupling connects the first output of the first capacitor and inductor type voltage controlled oscillator; The grid of the 4th tube coupling connects the second output of the first capacitor and inductor type voltage controlled oscillator; One end of second harmonic selectors connects power vd D; The other end of the 3rd inductance, the other end of the 4th inductance are connected with the other end of second harmonic selectors, push away-push away the reversed-phase output of voltage-controlled oscillator circuit as difference.
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|---|---|---|---|
| CN201410384957.0A CN104202044B (en) | 2014-08-06 | 2014-08-06 | A kind of difference pushes controlled oscillator and signal generation device |
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| CN201410384957.0A CN104202044B (en) | 2014-08-06 | 2014-08-06 | A kind of difference pushes controlled oscillator and signal generation device |
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| CN106953598A (en) * | 2017-03-16 | 2017-07-14 | 杭州电子科技大学 | A kind of orthogonal voltage-controlled vibrator circuit based on second harmonic Cross-injection locking technology |
| CN107332514A (en) * | 2017-06-30 | 2017-11-07 | 西安电子科技大学 | A kind of push-push voltage controlled oscillator without varactor |
| CN110708017A (en) * | 2019-09-25 | 2020-01-17 | 天津大学 | Novel Triple-push cross-coupled oscillator |
| CN111245369A (en) * | 2020-02-12 | 2020-06-05 | 南京理工大学 | Push-push type voltage-controlled oscillator based on SIW differential filter |
| CN113746429A (en) * | 2021-09-06 | 2021-12-03 | 芯灵通(天津)科技有限公司 | Stacking and stacking voltage-controlled oscillator based on transformer coupling |
| CN113839619A (en) * | 2021-08-15 | 2021-12-24 | 杭州电子科技大学 | High-power and high-efficiency silicon-on-chip dual-mode terahertz signal source structure |
| CN116260395A (en) * | 2023-05-15 | 2023-06-13 | 深圳芯盛思技术有限公司 | Ultra-wideband voltage-controlled oscillator circuit based on Colpitts structure |
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| CN110708017A (en) * | 2019-09-25 | 2020-01-17 | 天津大学 | Novel Triple-push cross-coupled oscillator |
| CN111245369A (en) * | 2020-02-12 | 2020-06-05 | 南京理工大学 | Push-push type voltage-controlled oscillator based on SIW differential filter |
| CN111245369B (en) * | 2020-02-12 | 2022-11-01 | 南京理工大学 | Push-push type voltage-controlled oscillator based on SIW differential filter |
| CN113839619A (en) * | 2021-08-15 | 2021-12-24 | 杭州电子科技大学 | High-power and high-efficiency silicon-on-chip dual-mode terahertz signal source structure |
| CN113839619B (en) * | 2021-08-15 | 2023-09-26 | 杭州电子科技大学 | High-power and high-efficiency on-chip silicon-based dual-mode terahertz signal source structure |
| CN113746429A (en) * | 2021-09-06 | 2021-12-03 | 芯灵通(天津)科技有限公司 | Stacking and stacking voltage-controlled oscillator based on transformer coupling |
| CN113746429B (en) * | 2021-09-06 | 2024-03-19 | 芯灵通(天津)科技有限公司 | Stacked voltage-controlled oscillator based on transformer coupling |
| CN116260395A (en) * | 2023-05-15 | 2023-06-13 | 深圳芯盛思技术有限公司 | Ultra-wideband voltage-controlled oscillator circuit based on Colpitts structure |
| CN116260395B (en) * | 2023-05-15 | 2023-08-04 | 深圳芯盛思技术有限公司 | Ultra-wideband voltage-controlled oscillator circuit based on Colpitts structure |
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